Preparation and properties of PVDF composite films modified with organic ferroelectric croconic acid

ABSTRACT

Poly(vinylidene fluoride) (PVDF) composite films modified with croconic acid were prepared and characterized by XRD, FTIR, TG, DSC, SEM, dielectric and ferroelectric test. The influence of loading content of croconic acid upon the structure, crystallinity, thermal stability, dielectric and ferroelectric properties of the modified PVDF films are investigated. The introduction of croconic acid could slightly improve the crystallinity of composite films. The dielectric constants of composite films could be two times larger than that of neat PVDF. The P_s value of PVDF composite film is lower than that of croconic acid, but is larger than that of pure PVDF.

KEYWORDS:

• Croconic acid
• poly(vinylidene fluoride)
• composite film
• ferroelectric property
• dielectric property

Funding

This work was supported by National Natural Science Foundation of China (21361012, 21661016 and 21461012), Department of Science and Technology of Jiangxi Province (20133ACG70007 and 20144BCB23038) and Science and technology research project of Jiangxi Provincial Department of Education (2016-28).